1.

Which represents alkall metals i.e. (`I^(st)` group metals) based on `(IE_(1))` and `(IE_(2))` value (in kJ/mol)?A. `{:(,(IE_(1)),(IE_(2)),),(X,500,1000,):}`B. `{:(,(IE_(1)),(IE_(2)),),(Y,600,2000,):}`C. `{:(,(IE_(1)),(IE_(2)),),(Z,550,7500,):}`D. `{:(,(IE_(1)),(IE_(2)),),(M,700,1400,):}`

Answer» Correct Answer - C
`ns^(1)rarr2^(nd)` I.E. of alkali metal is very high due to stable configuration


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